Math, asked by sripulijhu, 1 year ago

anyone solve no.14.... the above question is to prove

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Answered by leninviki

(1-2sin^2A)^2/(cos^2A-sin^2A)(cos^2A+sin^2A)
=(1-sin^2A-sin^2A)/cos^2A-sin^2A
=cos^2A-sin^2A
2cos^2A-1

sin^2a+cos^2a=1
sin^2a=1-cos^2a
cos^2a=1-sin^2a

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